Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ad8aecc67c8c0f0c07f6a9292216429b6b53bb138d2a52855d74105bc09c19c5' 
  AND token = 'U2x4YGXDr9jz+8gd0QUo8DpGeSwqpYrvxCiTX5aL08c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}